Sound Strength Calibration Methods

C.C.J.M. Hak, R.H.C. Wenmaekers, J.P.M. Hak, L.C.J. Luxemburg, van, A.C. Gade

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademic

10 Citaties (Scopus)
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Uittreksel

The sound strength G is a room acoustical parameter used to investigate the sound distribution in a hall or to compare the loudness between different halls. ISO 3382-1 describes several methods to measure G. The accuracy of a G measurement depends on the accuracy with which the power level of the sound source can be determined or with which the measurement system can be calibrated. In this research the different available sound strength calibration methods have been compared using a standard omnidirectional (dodecahedron) sound source. Using the same measurement equipment, different (system) calibration methods are compared: 1] free-field measurement in an anechoic room, 2] sound intensity measurement in an anechoic room, 3] diffuse-field measurement in a reverberation room, 4] near-field measurement on stage in a concert hall. For method 1, measurements have been performed in a horizontal plane with white noise and exponential sweeps at various distances from the sound source. For method 2, intensity measurements according to ISO 9614-3 have been performed using white noise while scanning the sound source surface with a two microphone probe. For method 3, the direct method and the comparison method according to the ISO 3741 standard have been used to determine the sound power level using white noise. Also, a system calibration has been performed in the anechoic room and the reverberation room using exponential sweeps. Finally, for method 4, a convenient near-field measurement method at a distance of 1 m has been performed on the stages of a large and a small concert hall using white noise and exponential sweeps. It has been found that the intensity and the diffuse-field calibration methods give substantially equal results. The horizontal-rotation free-field calibration method gives results that differ significantly from those of the diffuse-field and intensity methods. For a survey G measurement in a concert hall it is sufficient to perform an on-site calibration.
Originele taal-2Engels
TitelProceedings of 20th International Congress on Acoustics, ICA 2010
Plaats van productieSydney
UitgeverijAustralian Acoustical Society
ISBN van geprinte versie978-0-646-54052-8
StatusGepubliceerd - 2010
Evenementconference; ICA 2010 Sydney, Australia; 2010-08-23; 2010-08-27 -
Duur: 23 aug 201027 aug 2010

Congres

Congresconference; ICA 2010 Sydney, Australia; 2010-08-23; 2010-08-27
Periode23/08/1027/08/10
AnderICA 2010 Sydney, Australia

Vingerafdruk

acoustics
rooms
white noise
near fields
sound intensity
loudness
reverberation
microphones
scanning
probes

Citeer dit

Hak, C. C. J. M., Wenmaekers, R. H. C., Hak, J. P. M., Luxemburg, van, L. C. J., & Gade, A. C. (2010). Sound Strength Calibration Methods. In Proceedings of 20th International Congress on Acoustics, ICA 2010 Sydney: Australian Acoustical Society.
Hak, C.C.J.M. ; Wenmaekers, R.H.C. ; Hak, J.P.M. ; Luxemburg, van, L.C.J. ; Gade, A.C. / Sound Strength Calibration Methods. Proceedings of 20th International Congress on Acoustics, ICA 2010. Sydney : Australian Acoustical Society, 2010.
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Hak, CCJM, Wenmaekers, RHC, Hak, JPM, Luxemburg, van, LCJ & Gade, AC 2010, Sound Strength Calibration Methods. in Proceedings of 20th International Congress on Acoustics, ICA 2010. Australian Acoustical Society, Sydney, 23/08/10.

Sound Strength Calibration Methods. / Hak, C.C.J.M.; Wenmaekers, R.H.C.; Hak, J.P.M.; Luxemburg, van, L.C.J.; Gade, A.C.

Proceedings of 20th International Congress on Acoustics, ICA 2010. Sydney : Australian Acoustical Society, 2010.

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademic

TY - GEN

T1 - Sound Strength Calibration Methods

AU - Hak, C.C.J.M.

AU - Wenmaekers, R.H.C.

AU - Hak, J.P.M.

AU - Luxemburg, van, L.C.J.

AU - Gade, A.C.

PY - 2010

Y1 - 2010

N2 - The sound strength G is a room acoustical parameter used to investigate the sound distribution in a hall or to compare the loudness between different halls. ISO 3382-1 describes several methods to measure G. The accuracy of a G measurement depends on the accuracy with which the power level of the sound source can be determined or with which the measurement system can be calibrated. In this research the different available sound strength calibration methods have been compared using a standard omnidirectional (dodecahedron) sound source. Using the same measurement equipment, different (system) calibration methods are compared: 1] free-field measurement in an anechoic room, 2] sound intensity measurement in an anechoic room, 3] diffuse-field measurement in a reverberation room, 4] near-field measurement on stage in a concert hall. For method 1, measurements have been performed in a horizontal plane with white noise and exponential sweeps at various distances from the sound source. For method 2, intensity measurements according to ISO 9614-3 have been performed using white noise while scanning the sound source surface with a two microphone probe. For method 3, the direct method and the comparison method according to the ISO 3741 standard have been used to determine the sound power level using white noise. Also, a system calibration has been performed in the anechoic room and the reverberation room using exponential sweeps. Finally, for method 4, a convenient near-field measurement method at a distance of 1 m has been performed on the stages of a large and a small concert hall using white noise and exponential sweeps. It has been found that the intensity and the diffuse-field calibration methods give substantially equal results. The horizontal-rotation free-field calibration method gives results that differ significantly from those of the diffuse-field and intensity methods. For a survey G measurement in a concert hall it is sufficient to perform an on-site calibration.

AB - The sound strength G is a room acoustical parameter used to investigate the sound distribution in a hall or to compare the loudness between different halls. ISO 3382-1 describes several methods to measure G. The accuracy of a G measurement depends on the accuracy with which the power level of the sound source can be determined or with which the measurement system can be calibrated. In this research the different available sound strength calibration methods have been compared using a standard omnidirectional (dodecahedron) sound source. Using the same measurement equipment, different (system) calibration methods are compared: 1] free-field measurement in an anechoic room, 2] sound intensity measurement in an anechoic room, 3] diffuse-field measurement in a reverberation room, 4] near-field measurement on stage in a concert hall. For method 1, measurements have been performed in a horizontal plane with white noise and exponential sweeps at various distances from the sound source. For method 2, intensity measurements according to ISO 9614-3 have been performed using white noise while scanning the sound source surface with a two microphone probe. For method 3, the direct method and the comparison method according to the ISO 3741 standard have been used to determine the sound power level using white noise. Also, a system calibration has been performed in the anechoic room and the reverberation room using exponential sweeps. Finally, for method 4, a convenient near-field measurement method at a distance of 1 m has been performed on the stages of a large and a small concert hall using white noise and exponential sweeps. It has been found that the intensity and the diffuse-field calibration methods give substantially equal results. The horizontal-rotation free-field calibration method gives results that differ significantly from those of the diffuse-field and intensity methods. For a survey G measurement in a concert hall it is sufficient to perform an on-site calibration.

M3 - Conference contribution

SN - 978-0-646-54052-8

BT - Proceedings of 20th International Congress on Acoustics, ICA 2010

PB - Australian Acoustical Society

CY - Sydney

ER -

Hak CCJM, Wenmaekers RHC, Hak JPM, Luxemburg, van LCJ, Gade AC. Sound Strength Calibration Methods. In Proceedings of 20th International Congress on Acoustics, ICA 2010. Sydney: Australian Acoustical Society. 2010